| 4. HighGUI moduli funksiyalari
Ushbu bo‘limda HighGUI moduli funksiyalari bilan tanishamiz.
Namoyish oynasini yaratish:
int cvNamedWindow(const char* name,int flags = CV_WINDOW_AUTOSIZE);
Tasvirni yuklash:
IplImage* cvLoadImage(const char* filename,int iscolor = CV_LOAD_IMAGE_COLOR);
Tasvirni saqlash:
int cvSaveImage(const char* filename,const CvArr* image);
Tasvirni namoyish qilish:
void cvShowImage( const char* name, const CvArr* image );
Sichqoncha xodisalari (bosilishi):
void CvMouseCallback(int event,int x,int y,int flags,void* param);
Bu erda event ga quyidagi xodisalar bog‘langan:
Event (xodisa)
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Raqam qiymati
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CV_EVENT_MOUSEMOVE
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0
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CV_EVENT_LBUTTONDOWN
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1
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CV_EVENT_RBUTTONDOWN
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2
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CV_EVENT_MBUTTONDOWN
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3
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CV_EVENT_LBUTTONUP
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4
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CV_EVENT_RBUTTONUP
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5
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CV_EVENT_MBUTTONUP
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6
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CV_EVENT_LBUTTONDBLCLK
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7
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CV_EVENT_RBUTTONDBLCLK
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8
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CV_EVENT_MBUTTONDBLCLK
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9
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5. OpenCVda tasvirlarni qayta ishlash
Tekislash:
void cvSmooth( const CvArr* src, CvArr* dst, int smoothtype = CV_GAUSSIAN, int param1 = 3, int param2 = 0, double param3 = 0, double param4 = 0 );
Bu erda Smoothtype o‘zgaruvchisi quyiga tekislash turlarini o‘z ichiga olishi mumkin: CV_BLUR, CV_BLUR_NO_SCALE, CV_MEDIAN, CV_GAUSSIAN, CV_BILATERAL.
Morfologik Kengaytirish (Dilation):
void cvErode( IplImage* src, IplImage* dst, IplConvKernel* B = NULL, int iterations = 1 );
4.5-rasm. Morfologik kengaytirish.
Morfologik Emirish (Erosion):
void cvDilate( IplImage* src, IplImage* dst, IplConvKernel* B = NULL, int iterations = 1 );
4.6-rasm. Morfologik emirish.
Oqimli to‘ldirish (Flood Fill):
void cvFloodFill(IplImage* img, CvPoint seedPoint, CvScalar newVal, CvScalar loDiff = cvScalarAll(0), CvScalar upDiff = cvScalarAll(0), CvConnectedComp* comp = NULL, int flags = 4, CvArr* mask = NULL );
Hajmni o‘zgartirish (Resize):
void cvResize( const CvArr* src, CvArr* dst, int interpolation = CV_INTER_LINEAR );
Bu erda Interpolation o‘zgaruvchisi quyidagilarni o‘z ichiga olishi mumkin:CV_INTER_NN, CV_INTER_LINEAR, CV_INTER_AREA, CV_INTER_CUBIC.
Bo‘sag‘alash (Threshold):
double cvThreshold( CvArr* src, CvArr* dst, double threshold, double max_value,
int threshold_type );
Bu funksiya global bo‘sag‘a qiymati orqali tasvirni bo‘laklash (masalan binarlashtirish orqali) uchun hizmat qiladi. Undagi threshold_type o‘zgaruvchisi quyidagi bo‘sag‘alash turlarinini o‘z ichiga oladi:
CV_THRESH_BINARY, CV_THRESH_BINARY_INV, CV_THRESH_TRUNC, CV_THRESH_TOZERO_INV, CV_THRESH_TOZERO.
Adaptiv bo‘sag‘alash (Adaptive Threshold):
void cvAdaptiveThreshold( CvArr* src, CvArr* dst, double max_val, int adaptive_method = CV_ADAPTIVE_THRESH_MEAN_C, int threshold_type = CV_THRESH_BINARY, int block_size = 3, double param1 = 5 );
Bu funksiyada bo‘sag‘alash bloklarda, ya’ni kichik sohalarda amalga oshiriladi.
Quyidagi rasmda (4.7-rasm) berilgan tasvirni global va adaptiv bo‘sag‘alash yordamida binarlashtirish namunalari ko‘rsatilgan.
4.7-rasm. Berilgan tasvir hamda uning global va adaptiv bo‘sag‘alash natijasi.
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